2 definitions by Segadroid

To be rocking out on the game 'Rockband', a sort of musical rythm game with plastic guitars and colorful buttons.
What now, Mom? I can't go now, I'm Rockbanding the fuck out of Jessie here!
by Segadroid August 12, 2010
IcU means "I'm cool, you?". It is sometimes used in chatrooms for typing faster.
Bill: "Hey dude, how is it?"

John: "IcU?"

Bill: "Yeah, I'm fine."
by Segadroid May 4, 2009